none said:

google: "site:originaltrilogy.com/forum +your query"

It's finds most things, and it also can bring up topics which are beyond the purge level. (General SW for instance tends to maintain a 2000 post count, things from around 2005 are slowly getting pruned)

Can you provide an example of a topic that comes up in Google search results but isn't visible in the topic list? Nothing is getting pruned, so if topics are getting cut off at a certain date, there's a bug I need to find.